The invention discloses a power exchange transmission system, which includes a container, a station A and a station B located in the container, the station A is located above the station B, and the station A includes two Laminar flow turntable A, double-layer wire body A, hoist A, wire changing body A1, wire changing body A2, and controller A, and the power changing station B includes double-layer flow turntable B, double-layer wire body B, hoist B. Change the wire body B1, change the wire body B2 and its controller B. The double-layer wire body B is located on one side of the hoist B, and the double-layer flow turntable B is located on the side of the double-layer wire body B away from the hoist B. On one side, a lifting chain machine is fixedly installed on the hoist B, and two double-layer chains are driven and connected to the lifting chain machine. The invention can provide the service of quickly replacing fully-charged batteries for electric vehicles, and at the same time charge the under-charged batteries taken out from the vehicle. The main body of the electric inn is installed in a container, which is convenient for rapid movement.